Tool attachment



Janfz, 1923. LMLQBL F. D. RUPRECHT.

TOOL ATTACHMENT.

- FILED FEB. 7. 1921.

v J Y 177/49724/ JW, (M MM- FRANK D. RUPRECHT, 0F DUNEDIN, FLORIDA.

TOOL .ATTACHM-ENT.

Application filed February 7', 1921.

To all whom it may concern:

Be it known that 1, Beam; D. Rnrnnonr, a citizen of the United States,residing at Dunedin, in the-county of Pinellas and State of Florida,have invented acerta-in new and useful improvement in lool Attachments,of which the following is a full, clear, and exact description,reference being had to the accompanying drawings.

This invention relates to an attachment that is applicable to variouskinds of tools, but is especially suitable for use with jack knives forconverting them into draw knives.

The objects of the invention are to provide a. simple and inexpensiveattachment of the foregoing character that may be conveniently appliedto the tool and which is adjustable to adapt it to variouscircumstances; that is comparatively l1 ght of weight compact; durable,and convenient of -manipula tion.

These objects, and others which will become apparent as this descriptionproceeds, are attained through the combination and arrangement ofelements illustrated in the drawing accompanying and forming a parthereof and set out in the claims annexed hereto. p

In the drawing, Fig. 1 is an elevat'ional. view showing the attachmentapplied to a jack knife, whereby the latter is adapted for use as a drawknife; 2 is a plan view of "the attachment, the handle bein shown indotted lines in a position to which it may be folded when the instrumentis not in use; Figs. 3 and -l are inside face views of the adjacent endsof the handle and blade holder; Fig. 5 is sectional detail on the lines55 of Eggs. 1 and 2; F1g. (3 shows a modified form of the device; andFig. 7 is a sectional detail on the correspondingly numbered line ofFig. 6.

When used in connection with a jack knife, the back of the blade 1 iscontained within a groove 3 of holder to which the blade is securelybound by clamp This clamp is in the form of a loop which cmbraces theholder 4: and the shank of the blade adjacent the knife handle (5, thelo n of the clamp being reduced in width at i lower end to fit the shankof the blade, as will be seen by reference to Fig. 5. A thumb screw 7 isthreaded through the upper end of the loop and bears upon the holder.The clamp is prevented from passing over the outer end of the holder byan Serial No. 443,289.

enlargement designated 8. The blade holder terminates. at its inner endin a boss '10 which has a transverse groove 11, the sides whereof aretapered at a slight angle, as indicated in Figs. 2 and 4. A handle '12is adapted to be secured to the holder it in any one of severalangularly adjusted positions by meansof a screw 13 to which a wing nut14L is applied, the angularity of the handle being determined by theilJOSlQtiOIl of an octagonal boss 15 of the handle within the groove 11of the holder. It will be observed from Figs. 2 and 3 that the sides ofthe boss 15 are inclined to correspond to the taper of the side walls ofgroove 11. This effects a binding of the boss within the groove whichinsures a rigid connection between the parts when the wing nut is'dra-wnup tightly on the screw 18. When it is desired to change the angularrelation between the handle and holder, the nut il l withdrawnsuliiciently to permit disengagement of the boss 15 from the groove 11so that the handle may be rotated upon the screw 13. When the device isnot in use, the clamp 5 may be moved back along the holder to the dottedline position inFig. 2 and the handle 12 swung through 180 de grees fromits full line position to the dotted line position alongside the holderafter which the nut 14 may be tightened to hold the parts together, thehandle being offset at 16 to accommodate the clamp '5. 7

lVhile I have described my attachment with particular reference to itsuse with a jack knife, it will be readily understood that the same issusceptible to use in other connections, one obvious example being theemployment of it as a handle for a keyhole saw. In such a case, theshank of the blade occupies the same position in the holder 4: as theblade 1 does in Fig. 1, the saw blade proper projecting beyond the endof the holder. Likewise, a file may be attached to the holder. Thesealternative uses will be so readily understood that illustration of themis deemed unnecessary.

In Fig. 6 l have shown modification of the invention wherein the holder1 telescopes within a socket member 4 that is connected (in like mannerwith the former blade holder 4) to the handle 12. he holder 4 is adaptedto be adjusted along the socket member 1* to accommodate the particularlength of blade 1 wherewith the device is to be used. The holder is heldin any one

